Honestly Billy, you said this one would be hard.
Metro-General Hospital Interiors
The myriad of interiors were shot in part at the LondonEast-UK Business and Technical Park. This location was also used as the interiors of the U-Gin Genetics Lab in Avengers: Age of Ultron.
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Metro-General Balcony
The astral forms of Dr Strange and the Ancient One talk on this balcony overlooking the FDR Drive. This background plate for this shot appears to have been gathered at the Alexandria Center for Life Sciences in New York.
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(Doctor Strange, 2016)
MCU: Location Scout 